Pontoon cavitation/ventilation problem

Mac Bentley

Cadet
Joined
Nov 2, 2003
Messages
6
I have a 2012 20-foot Encore Bentley pontoon. It came with a Mercury 90hp, and I had no problems with it. Put a new Honda BF90 on it and have had constant cavitation/ventilation problems at 4000 rpm or more. Service guys have tried several props, lowered the engine an inch -- all it could go with the splash well, and no improvement. He says the Honda is the same size shaft as the Mercury. We've had problems whether it's just two of us on board or seven or eight. And help would be appreciated.
 

Mac Bentley

Cadet
Joined
Nov 2, 2003
Messages
6
I went by the shop today but was unable to talk to the guy I needed to. I'll get back here when I'm able to pin him down on what props he's tried. Thanks.
 

HotTommy

Lieutenant Junior Grade
Joined
Mar 15, 2013
Messages
1,025
Mac, I sent you a PM. ... And there's an entire forum here on iboats.com dedicated to propeller issues.
 
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